But when Jesus knew it, he withdrew himself - He knew of the plot which they had formed against his life; but his hour was not yet come, and he therefore sought security.
By remaining, his presence would only have provoked them further and endangered his own life. He acted, therefore, the part of prudence and withdrew. Compare the notes at Matthew 10:23.
Mark adds that he withdrew "to the sea;" that is, to the Sea of Galilee. or Tiberias. He states also Matthew 3:7-8 that "a great multitude from Galilee followed him, and from Judea, and from Jerusalem, and from Idumea, and from beyond Jordan; and they about Tyre and Sidon, a great multitude, when they heard what great things he did, came unto him." As some of these places were without the limits of Judea or inhabited by "Gentiles," this statement of Mark throws light on the passage quoted by Matthew Matthew 12:21, "In his name shall the Gentiles trust."
Pressed by the crowd Mark 3:9, Jesus went aboard a "small vessel," or "boat," called by Mark a "ship." This he did for the convenience of being separated from them and more easily addressing them. We are to suppose the lake still and calm; the multitudes, most of whom were sick and diseased, on the shore and pressing to the water's edge; and Jesus thus healing their diseases, and preaching to them the good news of salvation. No scene could be more sublime than this.

Jesus - withdrew himself from thence - It is the part of prudence and Christian charity not to provoke, if possible, the blind and the hardened; and to take from them the occasion of sin. A man of God is not afraid of persecution; but, as his aim is only to do good, by proclaiming every where the grace of the Lord Jesus, he departs from any place when he finds the obstacles to the accomplishment of his end are, humanly speaking, invincible, and that he can not do good without being the means of much evil. Yield to the stream when you cannot stem it.
Great multitudes followed him, and he healed them all - The rejection of the Gospel in one place has often been the means of sending it to and establishing it in another. Jesus healed all that followed him, i.e. all who had need of healing, and who desired to be healed; for thus the passage must be understood: - and is he not still the same? No soul shall ever implore his healing power in vain; but let it be remembered, that only those who follow Christ, and apply to him, are healed of their spiritual maladies.

But when Jesus knew it,.... Their consultation against him, as he did, not by any discovery made to him by men, but as the omniscient God; he withdrew himself from thence; from the synagogue and city, where he was, to the sea of Galilee, and his disciples with him, as Mark observes; not through fear, but because his time was not yet come, that he must suffer and die for his people; he had some other work to do first, and therefore rightly and wisely provides for his safety. And great multitudes followed him; from Galilee, Judea, Jerusalem, Idumea, and from beyond Jordan; and were joined by another multitude of people, who came from about Tyre and Sidon, as Mark relates: so that his departure was not so very private; nor was he forsaken by the common people, though the Pharisees were so offended with him. And he healed them all; that stood in need of healing, as many as had plagues and unclean spirits; practising agreeably to his doctrine, that it was lawful to do good on the sabbath day, and to heal the bodies as well as the souls of men.

But when Jesus knew it, he withdrew himself from thence--whither, our Evangelist says not; but Mark (Mark 3:7) says "it was to the sea"--to some distance, no doubt, from the scene of the miracle, the madness, and the plotting just recorded.
and great multitudes followed him, and he healed them all--Mark gives the following interesting details: "A great multitude from Galilee followed Him, and from Judea and from Jerusalem, and from Idumea, and from beyond Jordan; and they about Tyre and Sidon, a great multitude, when they had heard what great things He did, came unto Him. And He spake to His disciples, that a small ship should wait on Him because of the multitude, lest they should throng Him. For He had healed many; insomuch that they pressed upon Him for to touch Him, as many as had plagues. And unclean spirits, when they saw Him, fell down before Him, and cried, saying, Thou art the Son of God. And He straitly charged them that they should not make Him known" (Mark 3:7-12). How glorious this extorted homage to the Son of God! But as this was not the time, so neither were they the fitting preachers, as BENGEL says. (See on Mark 1:25, and compare James 2:19). Coming back now to our Evangelist: after saying, "He healed them all," he continues:

Jesus withdrew from thence. Left Capernaum for the time. He avoided needless danger until his earthly ministry was accomplished, and the bitter opposition of the Pharisees admonished him to temporarily withdraw.